8373408181 has 2 divisors, whose sum is σ = 8373408182. Its totient is φ = 8373408180.

The previous prime is 8373408161. The next prime is 8373408203. The reversal of 8373408181 is 1818043738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8337516100 + 35892081 = 91310^2 + 5991^2 .

It is a cyclic number.

It is not a de Polignac number, because 8373408181 - 2²³ = 8365019573 is a prime.

It is a super-2 number, since 2×8373408181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8373408161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4186704090 + 4186704091.

It is an arithmetic number, because the mean of its divisors is an integer number (4186704091).

Almost surely, 2^8373408181 is an apocalyptic number.

It is an amenable number.

8373408181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8373408181 is an equidigital number, since it uses as much as digits as its factorization.

8373408181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 8373408181 is about 91506.3286390619. The cubic root of 8373408181 is about 2030.6453803902.

The spelling of 8373408181 in words is "eight billion, three hundred seventy-three million, four hundred eight thousand, one hundred eighty-one".